![]() ![]() local time on June 22, 2019, when a vast plume of ash and volcanic gases shot up from its 700-meter-wide crater. The dormant period ended around 4:00 a.m. The small, oval-shaped island most recently exploded in 1924 and in 1778. The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with critical information for surface mapping and monitoring of dynamic conditions and temporal change.įrom NASA: Unlike some of its perpetually active neighbors on the Kamchatka Peninsula, Raikoke Volcano on the Kuril Islands rarely erupts. ![]() A joint U.S./Japan science team is responsible for validation and calibration of the instrument and data products. The instrument was built by Japan's Ministry of Economy, Trade and Industry. With its 14 spectral bands from the visible to the thermal infrared wavelength region and its high spatial resolution of about 50 to 300 feet (15 to 90 meters), ASTER images Earth to map and monitor the changing surface of our planet and is one of five Earth-observing instruments launched Dec. The image, acquired in October 2004, is a composite of ASTER bands 4-2-1 displayed in RGB. Found upon these rocks are 3.45 billion-year-old fossil stromatolites, colonies of microbial cyanobacteria. The iron-rich rocks formed before the presence of atmospheric oxygen, and life itself. From NASA: The Pilbara in northwestern Australia exposes some of the oldest rocks on Earth, over 3.6 billion years old.
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